SSB isn't dead by any means, but it's utility is quickly being crowded out sat phones, etc. Tradeoffs that come- to mind are:
- Communications with SSB is free, except perhaps for whatever email or weather service you subscribe to. But if you are using Sat communications, you are probably still subscribing to the same services, so that's really a wash. Sat commnuications, both voice and data, is quite expensive.
- It's way more complicated to operate an SSB that a Sat device, so I think many people gravitate towards Sat because they can actually make it work.
- SSB is tricky to get installed and working properly. I would bet that somewhere between 50% and 90% of SSB installations are never used or abandoned in favor of Sat because the installation is poor and doesn't work well. I'm in this camp right now trying to get my SSB working and usable.
- In many cases Sat coverage is not world wide. SSB can help fill in the gaps. Of course this only matters if you travel to the gap areas, and most people do not.
- Some activities are still conducted over SSB, and only SSB. Some cruisers nets are SSB only, and there are parts of the world where SSB is what everyone uses. This again doesn't matter unless you make use of these services and/or travel to these areas.
So for the vast majority of cruisers, I think SSB is of little use. But if you need it, you need it. Just a few weeks ago I found myself running for a week or so with no cell coverage, no VHF reception, and no Sat service. I couldn't get any weather forecast at all. And this was inland in the US. That's when I started focusing on getting my SSB working.